Linear System
Mostrando 25-36 de 2110 artigos, teses e dissertações.
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25. Increased depression and anxiety during the COVID-19 pandemic in Brazilian mothers: a longitudinal study
Reduced graphene oxide/ruthenium oxide hexacyanoferrate (rGO/RuOHCF) modified electrode showed synergic activity between the materials attested by the increase of electrochemical current and stability. The preparation of the nanocomposite was made by a simple two-step electrochemical approach. The material structure was characterized by spectroscopic techniq
Braz. J. Psychiatry. Publicado em: 2021-06
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26. The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach
The conditions of petroleum extraction may allow asphaltenes to precipitate, causing deposition that clogs wells, pipes and equipment, consequently reducing productivity. In this work, the solubility parameters and precipitation onset of polar fractions of heavy crudes from Brazilian fields were estimated using a simplified system of n-heptane/toluene mixtur
J. Braz. Chem. Soc.. Publicado em: 2021-04
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27. INTRODUÇÃO ÀS REDES NEURAIS PARA REGRESSÕES NÃO-LINEARES: AJUSTE DE SUPERFÍCIES DE ENERGIA POTENCIAL
The present work demonstrates how neural networks are used to do non-linear regressions. The technique is presented in a simple and didactic manner and applied to fit potential energy surfaces for the FeC molecule and for the reaction H + H2. It shows how to do the fitting for single- and multi-variable system providing examples and code that can be easily e
Quím. Nova. Publicado em: 2021-02
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28. Knee extension strength and handgrip strength are important predictors of Timed Up and Go test performance among community-dwelling elderly women: a cross-sectional study
ABSTRACT BACKGROUND: Handgrip and knee extension strengths have each been used to characterize disability. However, it has been reported that the association between handgrip and knee extension strengths is weak. OBJECTIVE: To evaluate the influence of knee extensor and handgrip muscle strength on Timed Up and Go (TUG) test results among elderly women wi
Sao Paulo Med. J.. Publicado em: 2021-02
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29. Direct healthcare costs and their relationships with age at start of drug use and current pattern of use: a cross-sectional study
ABSTRACT BACKGROUND: It is well known that early start of drug use can lead users to psychosocial problems in adulthood, but its relationship with users’ direct healthcare costs has not been well established OBJECTIVES: To estimate the direct healthcare costs of drug dependency treated at a community mental health service, and to ascertain whether earl
Sao Paulo Med. J.. Publicado em: 2021-02
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30. Mortality from malignant skin melanoma in elderly Brazilians: 2001 to 2016,
Abstract Background: Malignant skin melanoma is a serious public health problem, especially among the elderly population. Knowing the dynamics of the mortality rates of this disease in Brazil is essential to support the creation of public health policies. Objective: To analyze the temporal trend of mortality from malignant skin melanoma in elderly people i
An. Bras. Dermatol.. Publicado em: 2021-02
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31. Exponential stabilty for a Timoshenko system with nonlocal delay
RESUMO O objetivo deste artigo é estudar o sistema de Timoshenko com uma condição de retardo de tempo não local. A boa colocação é provada através do teorema de Hille- Yosida. Explorando as propriedades dissipativas do operador linear associado ao modelo totalmente amortecido, obtemos a estabilidade exponencial usando o Teorema de Gearhart- Huang-Pr�
TEMA (São Carlos). Publicado em: 2020-12
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32. ERRATA
ABSTRACT BACKGROUND: Cancer is a serious public issue problem worldwide. In Brazil, breast cancer is the most common type and cervical cancer is the third most frequent among women. OBJECTIVE: To analyze the temporal trend of coverage of mammography and cervical oncotic cytological testing, between 2007 and 2018. DESIGN AND SETTING: Time-series study cond
Cad. Metrop.. Publicado em: 2020-12
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33. Health-related quality of life in patients treated with atypical antipsychotics
Objective: To assess health-related quality of life and associated factors in patients treated with atypical antipsychotics, as well as to determine utility values using the EuroQol-5D-3L instrument. Methods: A cross-sectional study was conducted at a state-run pharmacy in the Brazilian National Health System. Individuals were included if they were using a
Braz. J. Psychiatry. Publicado em: 2020-12
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34. Inequalities in mammography and Papanicolaou test coverage: a time-series study
ABSTRACT BACKGROUND: Cancer is a serious public issue problem worldwide. In Brazil, breast cancer is the most common type and cervical cancer is the third most frequent among women. OBJECTIVE: To analyze the temporal trend of coverage of mammography and cervical oncotic cytological testing, between 2007 and 2018. DESIGN AND SETTING: Time-series study cond
Sao Paulo Med. J.. Publicado em: 2020-12
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35. DEVELOPMENT OF SOFTWARE FOR ANALYSIS OF BEHAVIOR AND WELFARE OF BROILERS
ABSTRACT The objective of this study was to develop a software based on image processing and computer vision techniques for monitoring the feeding/collective behavior of broilers (Cobb) and validate it based on the results obtained from the visual analysis of an expert. The visual analysis was performed based on the observation and quantification of behavior
Eng. Agríc.. Publicado em: 2020-12
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36. SPATIAL VARIABILITY OF IRRIGATED COMMON BEAN YIELD CORRELATED WITH THE FERTILITY OF A SANDY SOIL
ABSTRACT The common bean is widely cultivated in Brazil. In the 2016–2017 growing season, an experiment was carried out in a Typic Quartzipsamment (or Neossolo Quartzarênico) soil in the municipality of Cassilândia, MS, Brazil, with the aim of characterizing specific aspects of soil management, using a linear and spatial correlation between the irrigated
Eng. Agríc.. Publicado em: 2020-10